[Sync] Convert SyncSessionSnapshot to a copy-able class.

chrome/browser/sync/glue/sync_backend_host.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_SYNC_GLUE_SYNC_BACKEND_HOST_H_
 #define CHROME_BROWSER_SYNC_GLUE_SYNC_BACKEND_HOST_H_
 #pragma once
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/callback.h"
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/threading/thread.h"
 #include "chrome/browser/sync/glue/backend_data_type_configurer.h"
 #include "chrome/browser/sync/glue/chrome_extensions_activity_monitor.h"
 #include "chrome/browser/sync/glue/chrome_sync_notification_bridge.h"
 #include "chrome/common/net/gaia/google_service_auth_error.h"
 #include "googleurl/src/gurl.h"
 #include "sync/engine/model_safe_worker.h"
 #include "sync/internal_api/configure_reason.h"
 #include "sync/internal_api/sync_manager.h"
 #include "sync/notifier/sync_notifier_factory.h"
 #include "sync/protocol/encryption.pb.h"
 #include "sync/protocol/sync_protocol_error.h"
+#include "sync/sessions/session_state.h"
 #include "sync/syncable/model_type.h"
 #include "sync/util/report_unrecoverable_error_function.h"
 #include "sync/util/unrecoverable_error_handler.h"
 #include "sync/util/weak_handle.h"
 
 class MessageLoop;
 class Profile;
 
 namespace browser_sync {
 
-namespace sessions {
-struct SyncSessionSnapshot;
-}
-
 class ChangeProcessor;
 class JsBackend;
 class JsEventHandler;
 class SyncBackendRegistrar;
 class SyncPrefs;
 
 // SyncFrontend is the interface used by SyncBackendHost to communicate with
 // the entity that created it and, presumably, is interested in sync-related
 // activity.
 // NOTE: All methods will be invoked by a SyncBackendHost on the same thread
@@ skipping 196 matching lines @@
   // Asks the server to clear all data associated with ChromeSync.
   virtual bool RequestClearServerData();
 
   // Called on |frontend_loop_| to obtain a handle to the UserShare needed
   // for creating transactions.
   sync_api::UserShare* GetUserShare() const;
 
   // Called from any thread to obtain current status information in detailed or
   // summarized form.
   Status GetDetailedStatus();
-  const sessions::SyncSessionSnapshot* GetLastSessionSnapshot() const;
+  sessions::SyncSessionSnapshot GetLastSessionSnapshot() const;
 
   // Determines if the underlying sync engine has made any local changes to
   // items that have not yet been synced with the server.
   // ONLY CALL THIS IF OnInitializationComplete was called!
   bool HasUnsyncedItems() const;
 
   // Whether or not we are syncing encryption keys.
   bool IsNigoriEnabled() const;
 
   // Whether or not the Nigori node is encrypted using an explicit passphrase.
@@ skipping 51 matching lines @@
     UnrecoverableErrorHandler* unrecoverable_error_handler;
     ReportUnrecoverableErrorFunction report_unrecoverable_error_function;
   };
 
   // Allows tests to perform alternate core initialization work.
   virtual void InitCore(const DoInitializeOptions& options);
 
   // Called from Core::OnSyncCycleCompleted to handle updating frontend
   // thread components.
   void HandleSyncCycleCompletedOnFrontendLoop(
-      sessions::SyncSessionSnapshot* snapshot);
+      const sessions::SyncSessionSnapshot& snapshot);
 
   // Called to finish the job of ConfigureDataTypes once the syncer is in
   // configuration mode.
   void FinishConfigureDataTypesOnFrontendLoop();
 
   bool IsDownloadingNigoriForTest() const;
 
  private:
   // The real guts of SyncBackendHost, to keep the public client API clean.
   class Core;
@@ skipping 166 matching lines @@
   // is called. This way, before the UI calls SetDecryptionPassphrase on the
   // syncer, it can avoid the overhead of an asynchronous decryption call and
   // give the user immediate feedback about the passphrase entered by first
   // trying to decrypt the cached pending keys on the UI thread. Note that
   // SetDecryptionPassphrase can still fail after the cached pending keys are
   // successfully decrypted if the pending keys have changed since the time they
   // were cached.
   sync_pb::EncryptedData cached_pending_keys_;
 
   // UI-thread cache of the last SyncSessionSnapshot received from syncapi.
-  scoped_ptr<sessions::SyncSessionSnapshot> last_snapshot_;
+  sessions::SyncSessionSnapshot last_snapshot_;
 
   DISALLOW_COPY_AND_ASSIGN(SyncBackendHost);
 };
 
 }  // namespace browser_sync
 
 #endif  // CHROME_BROWSER_SYNC_GLUE_SYNC_BACKEND_HOST_H_